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An object weighing 347 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 316 N. Immersed in oil, the object weighs 328 N. Calculate the density
Assuming no mechanical energy is lost due to air resistance, show that the ensuing motion is periodic and determine the period of the motion.
Jose sees the tree strike 1.0 before he sees the barn strike. What was the time difference between the two events?
Remains in contact with the bow string for a time of 0.025 seconds. What is the speed of the arrow when it leaves the string?
Sally travels by car from one city to another. She drives for 28.0 min at 81.0 km/h, 53.0 min at 30.0 km/h, and 18.0 min at 22.0 km/h, and she spends 7.0 min eating lunch and buying gas.
A charge of +2q is 1 m to the left of a charge of -q which is 1 m to the left of an unknown positive charge. What is the direction of the force on the unknown charge due to the other two charges?
What is the minimum speed you must give the air at the top of the straw to draw ethyl alcohol upward through a height of 1.7 cm?
What is mathematical expression for photonic conductivity?
Determine the tangential and centripetal components of the net force exerted on a car (by the ground) when its speed is 38 m/s, and it has accelerated to this speed from rest in 9.5 s on a curve of
Standing on a sidewalk, you hear a frequency of 560 Hz from a siren of an approaching ambulance. After the amblance passes, you hear a frequency of 480 Hz. Find the speed of the ambulance.
A spaceship of proper length 296 m takes 0.80 µs to pass an Earth observer. Determine the speed of this spaceship as measured by the Earth observer.
A truck driver travels three-fourths the distance of his run at one velocity (v) and then completes his run at one half his original velocity (1/2v). What was the trucker's average speed for the tri
A coil with magnetic moment 1.45 is oriented initially with its magnetic moment antiparallel to a uniform magnetic field of magnitude 0.845.
Assume that the Earth-Moon (center-to-center) distance is 3.82 multiplied by 108 m and Earth's radius is 6.37 multiplied by 106. By what percent does the Moon's gravitational pull on you increase?
A bead of mass, m, slides without friction on a smooth rod along the x-axis. The bead is released from at x=3a with velocity Vo toward the origin. Find the speed as it passes the origin.
When a high-speed passenger train traveling at 170 km/h rounds a bend, the engineer is shocked to see that a locomotive has improperly entered onto the track from a siding and is a distance D = 601
A centrifuge in a medical laboratory rotates at an angular speed of 3650 rev/min. When switched off, it rotates through 52.0 revolutions before coming to rest. Find the constant angular acceleratio
A building 25m away at a point of 16m above the point of projection. Find the magnite and the direction of the velocity of the projectile as it strike the building.
Calculate the net torque about this axis due to the three forces shown in the figure if the magnitudes of the forces are F_1 = 18.0 {rm N} , F_2 = 16.1 {rm N}, and F_3 = 15.2 {rm N} . The plate and
If the output diameter of each head is 3.0 mm, how many liters of water do the four heads deliver per second?(c) How fast is the water flowing inside the 1.9 cm diameter pipe?
A cart of mass 6.8 kg is moving with a velocity of 15.2 m/s. It makes a head-on perfectly inelastic collision with a stationary cart B with mass 6.4 kg causing them to travel with a velocity 7.63 m
If the plane is frictionless, what is the speed v, of the center of mass of the sphere at the bottom of the incline?
What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 25 km/h and the coefficient of static friction between tires and track is 0.22?
Determine the escape speed from Jupiter's moon Callisto, with mass 1.07*10^23 and radius 2.40, (b)and a neutron star, with the Sun's mass crammed into a sphere with radius 5.90 km
An 80 000 kg airliner is flying at 900 km/h at a height of 10 km. What is its mechanical energy if the potential enrgy is 0 when the airliner was at rest on the ground?